Hey guys, so I found out my fuel pump is busted. I bought a new one and the shop I took it to wants to charge me 200$ for the installation. Now I do want the job done right but I really don't have the money to be paying 200$ extra for an installation.

So my question is, how difficult is it to replace a fuel pump on a 2004 mustang? I have done a few casual maintenance jobs on my car (brakes, oil, steering fluid etc). Any suggestions or advice?

Switching your fuel pump is a relatively easy job.
I'll try and summarize the steps for you the best I can remember.
The less fuel there's is in the fuel system and fuel tank the easier it is.
Park car in a neutral ground. Set your Parking break. Depending if your fuel pump primes or not you might want to purge the system in case.( For me just to be safe I pressed the inertia switch in the trunk to disengage the fuel pump. Put the key the on position. And pressed down on my Schrader valve, then I let it sit over night).

Disconnect your battery

Put blocks in the front wheels and jack up the rear
( Please us jack stands )

Open up the gas door and remove the 3 bolts

If the tank isn't drain or closed to empty. Preferably drain it now. Makes the job so much easier.

Get under the car. If I'm right there's a bolt holding the filler neck in place. Remove it

Set up something to support the fuel tank. You don't have to but I also make the job easier. I set up a 2 jack stands with a 2x4 leaving around a 6-8 inch gap in between the 2x4 and fuel tank.

You have to straps holding the fuel tank in place. Each strap is held in place by 2 bolts. Loosen the 2 bolts closets to the front. And take of the 2 rear bolts.

Lower the tank on to your support system. The weight will vary depending on your level of gas in the tank. Be careful no too her stretched the gas lines and what ever else is attached to the tanks

Let the tank rest on whatever support system you have set up. Disconnect the fuel lines and whatever else is attached to the tank.

At this point take the tank of the support. And lower it down at a angle. Making sure the filler neck comes out smoothly as it gets lowered to the ground.

Personally my tank was dirty on the top so I gently sprayed it down. So when I open it no stuff falls in. Just make sure you cover any openings up.

Remove the ring holding the pump in place. You'll need a flat head and a hammer or mallet.

Put the flathead on one of the groves and gently hammer it clockwise.
The ring should come off.

From there take the fuel pump out be careful you don't accidentally drop the sock in the tank.

Inspect the inside making sure nothing abnormal is in there.

Drop on the new pump with a new sock. And work your way back. Just make sure that you inspect the fillerneck gasket and make sure it's good.

I might have missed a few things. So anybody feel free I add or tell me if screwed up. Lol